/*
 * Copyright 2013 monkeyboy
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package com.googlecode.gwt.serialization;

/**
 * User: monkeyboy
 */
class CharVector {
    private int capacityIncrement;
    private char chars[];
    private int size;

    public CharVector(int initialCapacity, int capacityIncrement) {
        assert (initialCapacity >= 0);
        assert (capacityIncrement >= 0);

        this.capacityIncrement = capacityIncrement;
        chars = new char[initialCapacity];
    }

    public void add(char ch) {
        if (size >= chars.length) {
            int growBy = (capacityIncrement == 0) ? chars.length * 2
                    : capacityIncrement;
            char newChars[] = new char[(chars.length + growBy)];
            System.arraycopy(chars, 0, newChars, 0, size);
            chars = newChars;
        }

        chars[size++] = ch;
    }

    public char[] asArray() {
        return chars;
    }

    public char get(int index) {
        assert (index < size);

        return chars[index];
    }

    public int getSize() {
        return size;
    }

    public void set(int index, char ch) {
        assert (index >= 0 && index < size);

        chars[index] = ch;
        ++size;
    }
}